How the I2C protocol works

I found this interesting video explaining how the I2C or two-wire interface works.
Since this is a very popular protocol, you will meet soon or later in the embedded systems, so it's extremely worth to learn it!

http://howtomechatronics.com/tutorials/arduino/how-i2c-communication-works-and-how-to-use-it-with-arduino/

Enjoy!